UINavigationController 横向模式下的导航堆栈问题 [英] UINavigationController navigation stack problems in landscape mode

问题描述

我有一个 iPhone 应用程序，我目前正在将其转换为 通用二进制文件 以使用iPad.我已经成功实现了我在布局方面所需的一切，因此我的应用现在支持完整的横向功能(以前我主要使用纵向模式来显示内容).

I have an iPhone application that I am currently converting to a universal binary to work with the iPad. I have successfully implemented everything I need in terms of layout so that full landscape functionality is now supported in my app (previously I primarily used portrait mode to display content).

但是，我有一个奇怪的问题，它只发生在横向模式下:当我将视图控制器推入堆栈时，需要 两次点击后退按钮才能返回到上一个视图控制器！第一次点击显示一个空白视图，但在左侧的后退导航按钮上具有相同的名称，第二次点击将控制器返回到之前的视图.

But, I have one strange problem, and it ONLY occurs in landscape mode: when I push a view controller onto the stack, it takes two taps on the back button to return to the previous view controller! The first tap shows a blank view, but with the same name on the left-side back navigation button, the second tap takes the controller back to previous view like it should.

我没有要测试的 iPad，所以我依赖模拟器.该问题不会出现在 iPhone 上，并且如果您旋转回纵向模式也不会出现.

I don't have an iPad to test, so I am relying on the simulator. The problem does not show up on the iPhone and doesn't show up if you rotate back to portrait mode.

我的应用由一个 tabbarcontroller 和为其 vc 加载的导航控制器组成:

My app consists of a tabbarcontroller with navigation controllers loaded for its vc's:

//application delegate
- (void)applicationDidFinishLaunching:(UIApplication *)application
//....
WebHelpViewController *vc8 = [[WebHelpViewController alloc] init];
UINavigationController *nv8 = [[UINavigationController alloc] initWithRootViewController:vc8];

[self.tabBarController setViewControllers:[NSArray arrayWithObjects:nv1,nv2,nv3,nv4,nv5,nv6,nv7,nv8,nil]];

为了实现横向功能，UITabBarController 被覆盖以在需要时自动旋转:

To implement landscape capability, the UITabBarController is overridden to autorotate when required:

//CustomTabBarController.m
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return [[(UINavigationController *)self.selectedViewController topViewController] shouldAutorotateToInterfaceOrientation:interfaceOrientation];
}

... 工作正常.我使用这种方法导航到新视图

... works fine. I navigate into new views using this method

SomeViewController *vc = [[SomeViewController alloc] init];
[self.navigationController pushViewController:vc animated:YES];
[vc release];

这只是模拟错误吗?我该如何解决这个问题?

Is this only a simulation error? How do I fix this problem?

推荐答案

听起来好像另一个 ViewController 正在响应:

It sounds like another ViewController is responding to:

(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

先检查一下.

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